Ban on Deceptive Unsolicited Bulk Electronic Mail Act of 2003 - Makes it unlawful for any person to knowingly use a computer or computer network to: (1) falsify or forge electronic mail (e-mail) transmission information in connection with the transmission of unsolicited bulk electronic mail through or into the computer network of an e-mail service provider or its subscribers; (2) transmit an e-mail message to a recipient who requests not to receive unsolicited bulk commercial e-mail; or (3) collect e-mail addresses from public and private spaces in order to transmit unsolicited bulk commercial e-mail. Establishes a violation as: (1) a predicate offense under the Racketeering Influenced and Corrupt Organization Act; and (2) an unfair or deceptive act or practice under the Federal Trade Commision Act.
Requires any person sending unsolicited bulk commercial e-mail to provide to its recipients a clear and conspicuous opportunity to request not to receive future unsolicited e-mail.